WARNING: This article covers the Aviary as it appears in Jurassic Park III. For the Aviary originally planned for Jurassic Park, see Jurassic Park Aviary. For the Aviary seen in Jurassic World, see Jurassic World Aviary.
The Isla Sorna Aviary was placed in a canyon over a river, probably because it provided fish for its residents. The entrance, however, was on the top of the canyon, and it would take several flights of stairs to reach the bottom. Because of this placement, immense fog would be generated and engulf most of the aviary. A metal door kept the inhabitants from escaping and was kept locked at all times. Outside of this door docked a barge.
The Isla Sorna Aviary was connected to an observatory that could be used to enter it. The observatory was guarded by a large perimeter fence more advanced than the ones used in Jurassic Park. The building had three floors. The third floor was a watchtower, the second floor had two steel doors and the first floor had an area that had a stairway to the bridge that led to the aviary and an unknown location, all connected by a spiral staircase. Furthermore, at the end of the bridge that led to the bird cage were stairs to an elevated platform which in turn led to a walkway.
InGen created the Isla Sorna Aviary sometime during the mid-late 1980s or early 1990s to raise Pteranodon and possibly other pterosaurs, for their new dinosaur park Jurassic Park. When the inhabitants reached a certain age, they would be transported to Isla Nublar to live in InGen's dinosaur park, though pterosaurs such as Pteranodon weren't planned to be seen by the public eye until Phase 2 of Jurassic Park occurred in the future.
However, things turned sour when the Isla Nublar Incident of 1993 cancelled Jurassic Park and when Hurricane Clarissa struck Isla Sorna, causing the workers on the island to abandon the animals they cared for. Unlike most of the prehistoric fauna on the island, the InGen workers did not free any of the Pteranodons; instead they kept them trapped in their enclosure. Though judging by the existence of wild Pteranodons in the south of the island, there may have been some that were either freed, escaped the enclosure or just might have come from a different facility all together.
Many parts of the aviary including the walkway and the fence that protected the observatory were damaged at an unknown date from either lack of care and old age or from Hurricane Clarissa.
By 2001, there were four adult Pteranodon and a nest of six juveniles.
Soon afterward, Dr. Alan Grant and Eric Kirby met up with Amanda and Paul Kirby and Billy Brennan on the opposite sides of the Isla Sorna Aviary's large lookout fence. While they were expressing their joy of being reunited, the vicious Spinosaurus attacked Dr. Grant and Eric. The two evaded the Spinosaurus by crawling through a puncture in the fence; but when the Spinosaurus seemed to have given up on the humans, it charged through the fencing and got to the other side.
The group immediately rushed to get inside the building behind them. Paul and Dr. Grant locked the steel doors of the observatory, which halted the Spinosaur's pursuit of them and it soon returned to the jungle. While inside, Grant discovered why a Velociraptor had followed his group. Billy Brennan had stolen their eggs that they had come across earlier. Afterward, the group continued their escape from the island and descended the spiral staircase but when Dr. Grant tried to go down the stairs to the unknown area, they suddenly collapsed on him from a mixture of factors, causing him and the other survivors to take the nearby bridge.
Dr. Grant was the first to cross with Amanda Kirby being the second. But as the thick fog faded, Dr. Grant discovered that they were near a birdcage. As soon as he made this discovery, a Pteranodon snatched Eric Kirby so it could feed him to its young. Billy bravely went to save Eric by paragliding after him with the rest of the humans running desperately through the walkway trying to reach the boy as well. However, they reached a part of the walkway that was missing so they were unable to reach the rest of it. While they were stuck a Pteranodon attacked them, but when the flying reptile got inside the corridor it collapsed from the giant pterosaur's weight, which most likely killed it.
Eventually, the humans, minus Billy who had sacrificed himself to save his fellow survivors, escaped once they reached the barge, but the steel door that Amanda Kirby and her son Eric used to get out of the Isla Sorna Aviary unlocked itself shortly after she had relocked it. This allowed three adult Pteranodons to depart the enclosure they spent most of their lives in. The remaining pterosaur juveniles that survived the conflict with the humans were left behind for some reason and probably died from starvation or some other means.
In the Jurassic Park III arcade game, the InGen rangers enter the Isla Sorna Aviary (called simply "Bird Cage" in the game) during their quest to rescue the survivors of a plane crash on Isla Sorna. Unlike in the Movie canon, Pteranodon and pterosaurs are not the only inhabitants of the aviary as the territorial Velociraptor is encountered as well. The rangers ultimately kill many of the Pteranodons residing there and leave the enclosure via the barge stationed there.
The Isla Sorna Aviary appears in the game's Jurassic Park III story and its Isla Sonra Hub.
Its only appearance in the game's story is in the level "The Bird Cage" and its prelude. Before first initiating the level, the player(s) must open the doors to the aviary. In the level itself, the survivors are scared into the aviary by the Spinosaurus and they later go down the observatory's staircase after Dr. Grant discovers that Billy is in possession of raptor eggs. As they walk on its bridge, Alan discovers that it is a birdcage and a Pteranodon snatches Eric.
Throughout the first half of the level, the player(s) must go through the aviary's walkway to reach Eric Kirby. At the end of the walkway, Billy decides to parasail to Eric and rescues him from the hungry Pterosaur juveniles. He then drops Eric on top of the back of a Pteranodon cornering the other survivors, causing the section of the aviary that the humans were inside to tilt downward and the humans to fall into the water below, which allowed them to reach the nearby boat that Alan Grant had found in the previous level "Eric Kirby".
On the Isla Sorna Hub, Charlie Degler can be found just outside and a variation of his mother Ellie Sattler called "Ellie Degler" found inside the Observatory are both available for purchase. The player(s) can go down the Observatory's stairway where they can enter the aviary itself, which is on of the two areas in the game where pterosaurs can be spawned, the other being the Jurassic World Aviary. This is also the only area in which the juvenile Pteranodon is playable and it is used to acquire a red brick.